Fracture flow characterization with low-noise Spontaneous Potential logging

André C G Kowalski, Carlos A Mendonça, Ulrich S Ofterdinger

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Abstract

Geophysical well logging has been applied for fracture characterization in crystalline terrains by physical properties measurements and borehole wall imaging. Some of these methods can be applied to monitor pumping tests to identify fractures contributing to groundwater flow and, with this, determine hydraulic conductivity and transmissivity along the well. We present a procedure to identify fractures contributing to groundwater flow using spontaneous potential measurements generated by electrokinetic processes when the borehole water head is lowered and then monitored while recovering. The electrokinetic model for flow through a tabular gap is used to interpret the measured data and determine the water head difference that drives the flow through the fracture. We present preliminary results at a test site in crystalline rocks on the campus of the University of São Paulo. 

Original languageEnglish
JournalGroundwater
Early online date19 Apr 2020
DOIs
Publication statusEarly online date - 19 Apr 2020

Bibliographical note

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ASJC Scopus subject areas

  • Water Science and Technology
  • Computers in Earth Sciences

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